13728969 has 12 divisors (see below), whose sum is σ = 19863792. Its totient is φ = 9137400.

The previous prime is 13728959. The next prime is 13728971. The reversal of 13728969 is 96982731.

It is not a de Polignac number, because 13728969 - 2⁵ = 13728937 is a prime.

It is a super-2 number, since 2×13728969² = 376969179605922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13728959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7954 + ... + 9524.

It is an arithmetic number, because the mean of its divisors is an integer number (1655316).

Almost surely, 2^13728969 is an apocalyptic number.

It is an amenable number.

13728969 is a deficient number, since it is larger than the sum of its proper divisors (6134823).

13728969 is a wasteful number, since it uses less digits than its factorization.

13728969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2548 (or 2545 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 13728969 is about 3705.2623388905. The cubic root of 13728969 is about 239.4487870705.

The spelling of 13728969 in words is "thirteen million, seven hundred twenty-eight thousand, nine hundred sixty-nine".